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(No Model.)

B. P. HEFPERNAN.

PENDANT STEM FOR WATCHES.

N0. 345,055. Patented July 6, 1886.

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UNITED STATES PATENT OFFICE.

EDlVARD F. HEFFERNAN, OF TORONTO, ONTARIO, CANADA, ASSIGNOR TO THE KEYSTONE W'ATGH CASE COMPANY.

PENDANT-STEM FOR WATCHES.

SPECIFICATION forming part of Letters Patent No. 345,055, dated July 6,1886. Application filed January 28, 1886. Serial No. 190,072. (No model.) Patented in Canada February 13, 1886, No. 23,419.

To all w/tom it may concern:

Be it known that I, EDWARD FRANCIS HEF- FERNAN, of the city of Toronto, in the county of York, in the Providence of Ontario, Canada, watclrmaker, have invented certain new and useful Improvements in Stem-Winding \Vatches, of which the following is a specification.

The object of the invention is to design a simple device for holding the stem of the watch in position either for winding the works or setting the hands; and it consists, essentially, in making the stem preferably solid with the cap or crown of the pendant, and forming on the said stem two grooves separated by a narrow beveled collar, the said stem passing between the forks of a spring-catch held within the center in such a manner and position that the spring-catches shall clip into either one or other of the grooves, so as to hold the said stem either in the required position for winding the works or in the position in which it should stand for setting the hands, substantially as hereinafter more particularly explaincd.

Figure 1 is a perspective view, partially in section, to expose the stem and spring-catch for holding the same. Figs. 2 and 3 are similar views showing alternative forms of springcatch. Fig. at is a detail of the stem, showing the grooves. Fig. 5 is a detail of springcatch.

I am aware that it has been proposed to provide the pendant with a springcatch, and

a longitudinallyadjustable push-pin, so constructcd that the spring will retain it in two positionsene for winding and one for setting. Therefore I do not claim such a construction. 0 In my invention the spring-catch is made complished in either casethat is to say, in

Fig. 1 the prongs of the fork spring into opposite sides of one of the grooves made in the stem A; in Fig. 2 the spring ends will do likewise, and in Fig. 8 the single prongs. groove a is made in such a position in the stem A that when it is opposite to the spring-catch E the said stem is in proper position for winding the works of the watch, and the groove b is in such a position on the stern A that when it is opposite to the spring-catch E the stem is in proper position for setting the hands of the watch. The two grooves a and Z) are separated by a narrow collar, (1, which collar is beveled from the base of each groove, so as to permit 6 the spring-catch E to slip over it when the stem A is adjusted, as and for the purpose specified.

\Vhile it will be found advisable to have a double catchthat is to say, one on each side of the stem, such as is shown in Figs. 1 and 2- the same effect would in a measure be secured with a single catch; but in a single catch the spring would of course have a tendency to push the stem A on one side of the winding pinion, which in my opinion would be objectionable.

WVhen the spring-catch shown in Fig. 1 is used, I generally provide an expandingscrew,

F, so that the prongs of the fork may be sep arated in order to carry them clear of the groove and permit the withdrawal of the stem A. p

In place of the screw F being made to expand the springcatch, it might be made to draw the legs of the catch together, though the former construction is preferable. The only function of the adjusting-screw is to control the tension of the spring-catch.

What I claim as my invention is- 9o 1. In a stenrwinding watch, the stem A, fixed to the cap or crown B, and having grooves a and I) made in it, in combination with the spring catch E, located wholly within the watch-case center, arranged substantially as 5 and for the purpose specified.

2. In a stein-winding watch, the stem A, having grooves a and Z), separated by a beveled collar, (2, in combination with the spring-catch E, located wholly within the watch-case cen- The 55 ter, substantially as and for the purpose specified.

3. In a stem-winding watch, the stem A, having grooves a and b, made in it, in combination with the forked spring-catch E, held in the center D, and adjusted by the expandingscrew F, substantially as and for the purpose specified. 1

4. In a stem-winding watch, the center and its pendant, in combination with a springcatch consisting of two spring-jaws projecting from a curved body portion rigidly supported Within the center and independent of the pendant, and the push-pin having a collar adapted to be held upon either side of said springcatch, substantially as and for the purpose specified. 1

5. In a stem-winding watch, the center having an adjusting-hole and its pendant, in combination with a spring-catch rigidly supported within the center and independent of the pendant, an adj usting-screw to regulate the ten sion of the catch located within or under the hole in the center, and the push-pin having a collar adapted to be held upon either side of said spring-catch, substantially as and for the purpose specified.

6. In a stem-winding watch, the center hav ing an adjusting-hole upon its face, in combination with a curved spring-catch having two flexible arms or jaws, and adapted to fitwithin the center, and a push-pin having that part within the center provided with a collar, substantially as shown, and adapted to be snapped upon either side of the said spring-catch, sub- 3 5 stantially as and for the purpose specified.

7. In a stem-winding watch, the center having an adjusting-hole upon its face, in combination with a curved springcatch having two flexible arms or jaws and adapted to fit with- 0 in the center, an adjusting-screw adapted to adjust the said spring-arms to or from each other, and a push-pin having that part-within the center provided with a collar, substantially as shown, and adapted to be snapped upon 5 either side of the said springcatch, substan tially as and for the purpose specified.

Toronto, January 18, 1886.

E. F. HEFFERNAN.

In presence of CHARLES C. BALDWIN, GHAs. H. RIoHEs. 

